Metal complexes of monocarbon carboranes bearing C-amine or -amino substituents

Substitution, cage functionalization, and oxidation of the charge-compensated triruthenium monocarbollide cluster complex [1-SMe2-2,2-(CO)2-7,11-(µ-H)2-2,7,11-{Ru2(CO)6}-closo-2,1-RuCB10H8]

“…The presence of the PMe 3 ligand in this compound results in a loss of symmetry, rendering the two B-H Ru units non-equivalent. Hence there are two diagnostic 6 quartet resonances for these groups in the 1 From the NMR data for 5 it was evident that the complex had only one B-H Ru linkage [ 1 H NMR: d −10.24, q, J(BH) = 77 Hz; 11 B NMR: d 30.0, J(BH) = 67 Hz], while a singlet resonance seen in the 11 B spectrum at d 49.9, also of unit integral, is in the chemical shift region indicative of a direct B-Ru twocentre bond. 6 Moreover, in the 1 H NMR spectrum a 31 P-coupled doublet peak was also observed at d −18.57 [J(PH) = 10 Hz] diagnostic for a Ru(l-H)Ru linkage.…”

3 Boron

“…2 The chemistry of icosahedral metal-monocarbaborane complexes (M = Ru, Os, Rh, Mo, W & Re) in which the carbon atom of the {CB 10 } fragment carries an exo-polyhedral -NR 2 or -NR 3 group has been reviewed. 3 A review describing the chemistry of organometallic complexes with 1,2-dichalcogenolato-1,2-dicarbododecaborane (E 2 C 2 B 10 H 10 , E = S, Se, Te) ligands has also been published. 4 An account of recent (1998)(1999)(2000)(2001)(2002)(2003) chemistry of transition metal boryl and borylene complexes has been published.…”

“…112 The B(C 6 F 5 ) 3 , B(Ph) 3 and BCl 3 adducts of nitriles RCMN (R = C 6 H 4 -p-CF 3 , C 6 H 4 -p-CMN, (CH 2 ) 4 CMN & CH 2 CMN) have been shown to react with [Cp 2 V] to form a series of vanada(IV)azirene complexes, several of which have been structurally characterised. 113 Reaction of N-methylpyrrole and N-methylindole with B(C 6 F 5 ) 3 results in the formation of two new zwitterionic species, in which a C (a) -B bond and an acidic sp 3 -methylene carbon are formed as part of the heterocyclic ring. Both complex have been found to be efficient activators in the [(Ind) 2 ZrMe 2 ] catalysed polymerisation of ethylene.…”

11 Chromium, molybdenum and tungsten

“…Reviews were published covering the following subjects: (i) advances in the chemistry of organometallic complexes with 1,2-dichalcogenolato-o-carborane ligands for molybdenum and tungsten complexes; 171 (ii) synthesis and coordination behaviour of heteroscorpionate ligands derived from bis(pyrazolyl)methanes; 172 (iii) icosahedral metal-monocarbollide complexes of molybdenum and tungsten; 173 (iv) recent developments in the chemistry of transition metal complexes of boron. 174 The stable molybdenum(V) complex Tp9MoOCl 2 was oxidised under mass spectrometric conditions; 175 the oxidised species react with tertiary phosphines to give adducts which were detected by mass spectrometry.…”